# SpotOn Grading System Comic Ed vs Card Centering Calculator

The clearest difference is review sentiment: Card Centering Calculator at 60% against SpotOn Grading System Comic Ed's 13%. Card Centering Calculator also leads on rating (4.7 vs 3.3) and ratings volume (2.5K vs 24). SpotOn Grading System Comic Ed's advantage is ads (none vs shown) and iOS requirement (12.4 vs 18.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. SpotOn Grading System Comic Ed sells 1 in-app purchase, starting at $14.99 per year and Card Centering Calculator sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Card Centering Calculator holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Card Centering Calculator has 2.5K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 13% of SpotOn Grading System Comic Ed's written reviews are positive against 60% of Card Centering Calculator's.

SpotOn Grading System Comic Ed ships an update every 5 months, Card Centering Calculator monthly. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | SpotOn Grading System Comic Ed | Card Centering Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (24 ratings)](https://appshunter.io/ios/app/spoton-grading-system-comic-ed/id1288463477/reviews) | **[4.7 (2.5K ratings)](https://appshunter.io/ios/app/card-centering-calculator/id6661022837/reviews)** |
| Number of ratings | 24 | **2.5K** |
| Positive reviews | 12.5% of reviews | **60.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 92 MB | 21 MB |
| Requires iOS | **12.4** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fenix Flame Comics, LLC](https://appshunter.io/developer/1288463476) | [Jade Lizard Software LLC](https://appshunter.io/developer/528029155) |

## What reviewers say

### SpotOn Grading System Comic Ed

[App page](https://appshunter.io/ios/app/spoton-grading-system-comic-ed/id1288463477)

Quickly grade comic books on the spot with a series of multiple-choice questions. Get grades comparable to professional services and track your past assessments. Offers a YouTube tutorial for guidance.

**Highlights:** On-the-spot comic book grading, Multiple-choice question format, Comparable to third-party grading, Track past graded books, Identify Qualified or Restored labels, Video tutorial available

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited grading for 1 year | $14.99 | per year |


### Card Centering Calculator

[App page](https://appshunter.io/ios/app/card-centering-calculator/id6661022837)

This app helps collectors and traders measure card centering ratios for grading. It uses AI to detect centering or allows manual adjustments for precise measurements, displaying potential grades from major companies.

**Highlights:** AI-powered card centering detection, Manual centering measurement with zoom, Grade comparisons for PSA, BGS, SGC, CGC, TAG, ACE, Front and back side centering measurement, Grading standards reference guide, Off-center visualization tool

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Unlock Premium | $4.99 | one-time |
| Large Tip | $4.99 | one-time |
| Pristine Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Intuitive and flexible
- 🚀 Provides great information on centering
- 💡 Helpful for graders and collectors
- 👍 Easy to use and user-friendly
- 👍 Accurate and works as a physical tool

**What reviewers complain about**

- 🐛 Centering measurement doesn't work properly
- 🔒 Grading information locked behind paywall
- 🐛 Camera quality issues, app resets during use

**Reported bugs**

- Centering measurement resets during use
- Image rotation doesn't stay in place

**Requested features**

- Thinner and dashed centering lines for better visibility
- Free access to grading information without subscription


## Frequently asked questions

### Is SpotOn Grading System Comic Ed free?

SpotOn Grading System Comic Ed is free to download, with in-app purchases available.

### Is Card Centering Calculator free?

Card Centering Calculator is free to download, with in-app purchases available.

### Which has better reviews, SpotOn Grading System Comic Ed or Card Centering Calculator?

Card Centering Calculator is rated higher. SpotOn Grading System Comic Ed averages 3.3 out of 5 from 24 ratings, while Card Centering Calculator averages 4.7 from 2.5K ratings.

### Do SpotOn Grading System Comic Ed or Card Centering Calculator have ads?

Card Centering Calculator shows ads; SpotOn Grading System Comic Ed does not.

### Which is updated more often, SpotOn Grading System Comic Ed or Card Centering Calculator?

SpotOn Grading System Comic Ed ships an update every 5 months, and Card Centering Calculator monthly. Most recently, SpotOn Grading System Comic Ed was updated on October 3, 2026 and Card Centering Calculator on October 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*